The Doughnut

The Doughnut is the nickname for the headquarters of GCHQ, Britain’s cryptography and intelligence agency. It stands on a 71-hectare site in Benhall, a suburb of Cheltenham in Gloucestershire. The building’s circular shape, resembling a doughnut, gives it its name. Completed in 2003 and fully occupied by 2004, it replaced more than fifty scattered buildings across Cheltenham. The site now employs 5,500 people, making GCHQ the largest single employer in the county. A second, undisclosed building nearby now shares the workload. The Doughnut cost £330 million and was the largest private finance initiative project ever undertaken by the British government. Its construction faced sharp criticism when costs ballooned from £41 million to £450 million due to the complexity of moving sensitive computer systems. The building’s design aimed to bring staff closer together, with any worker able to reach another within five minutes. The director’s office was deliberately omitted so that Iain Lobban, then director, could sit among lawyers within shouting distance. The building also houses the GCHQ archive, holding sixteen million historical artefacts. Inside, a circular walkway called The Street runs through the three identical four-storey blocks. At the heart lies an open-air garden large enough to hold the Royal Albert Hall, with a memorial to five staff killed in Afghanistan. Below the garden sit supercomputers, while the 24/7 operations centre monitors systems around the clock. Staff have access to a 600-seat restaurant, cafes, shops, a gymnasium, and a quiet room. Exhibits include radios once used by the Portland spy ring, displayed throughout the building.